Pakistani singer Shafqat Amanat Ali, who often composes his own songs, says it's a challenge to croon a song composed by someone else.

"It is very challenging to sing for someone else's compositions and someone else's creation. If you are good enough, have done your homework, you can sing it well, otherwise you are not fit for singing, " the singer told.

In India, Ali is known for songs like "Mitwa" ("Kabhi Alvida Na Kehna"), "Tere naina" ("My Name Is Khan") and "Bin tere" ("I Hate Luv Storys").